[507] | 1 | package gov.hhs.fha.nhinc.gateway.aggregator.persistence;
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| 2 |
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| 3 | import java.util.Date;
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| 4 |
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| 5 | import org.apache.commons.logging.Log;
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| 6 | import org.apache.commons.logging.LogFactory;
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| 7 |
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| 8 | import gov.hhs.fha.nhinc.properties.PropertyAccessor;
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| 9 | import java.util.Calendar;
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| 10 |
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| 11 | /**
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| 12 | * This class is used to manage the garbage collection on the AGGREGATOR
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| 13 | * database tables. It will get run each time a startTransaction is called,
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| 14 | * and it will use settings in the gateway.properties file to determine
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| 15 | * how often to kick off the garbage collection thread and how hold a
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| 16 | * transaction must be to be considered stale.
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| 17 | *
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| 18 | * @author Les Westberg
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| 19 | */
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| 20 | public class GarbageCollectorMgr
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| 21 | {
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| 22 | private static Log log = LogFactory.getLog(GarbageCollectorMgr.class);
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| 23 | private static Date dtLastRun = new Date(); // The date that the garbage collector was last run.
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| 24 | private static final String GATEWAY_PROPERTY_FILE = "gateway";
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| 25 | private static final String GARBAGE_COLLECT_TIME_DURATION = "aggregatorGarbageCollectionTimeDuration";
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| 26 | private static final String GARBAGE_COLLECT_STALE_DURATION = "aggregatorGarbageCollectionStaleDuration";
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| 27 |
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| 28 | /**
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| 29 | * Default constructor.
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| 30 | */
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| 31 | public GarbageCollectorMgr()
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| 32 | {
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| 33 | }
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| 34 |
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| 35 | /**
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| 36 | * This method checks to see if we should run the collector based on the
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| 37 | * time settings in the gateway.properties file. If we should run it, then
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| 38 | * true is returnd. Otherwise false is returned.
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| 39 | *
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| 40 | * @return TRUE if we should run the garbage collector.
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| 41 | */
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| 42 | private static boolean bRunCollector()
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| 43 | {
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| 44 | String sTimeDuration = "";
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| 45 | int iTimeDuration = 0;
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| 46 | try
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| 47 | {
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| 48 | sTimeDuration = PropertyAccessor.getProperty(GATEWAY_PROPERTY_FILE, GARBAGE_COLLECT_TIME_DURATION);
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| 49 | iTimeDuration = Integer.parseInt(sTimeDuration);
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| 50 | }
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| 51 | catch (Exception e)
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| 52 | {
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| 53 | String sErrorMessage = "Failed to read and parse property: " + GARBAGE_COLLECT_TIME_DURATION +
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| 54 | " from PropertyFile: " + GATEWAY_PROPERTY_FILE + ".propertues. No " +
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| 55 | "garbage collection will be done on the aggregator tables.";
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| 56 | log.error(sErrorMessage);
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| 57 | return false;
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| 58 | }
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| 59 |
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| 60 | if ((sTimeDuration == null) ||
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| 61 | (sTimeDuration.length() <= 0))
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| 62 | {
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| 63 | String sErrorMessage = "Failed to read and parse property: " + GARBAGE_COLLECT_TIME_DURATION +
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| 64 | " from PropertyFile: " + GATEWAY_PROPERTY_FILE + ".propertues. No " +
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| 65 | "garbage collection will be done on the aggregator tables.";
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| 66 | log.error(sErrorMessage);
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| 67 | return false;
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| 68 | }
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| 69 |
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| 70 | Calendar oCal = Calendar.getInstance();
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| 71 | oCal.add(Calendar.SECOND, (-1) * iTimeDuration);
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| 72 |
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| 73 | if (oCal.getTime().getTime() > dtLastRun.getTime())
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| 74 | {
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| 75 | return true;
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| 76 | }
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| 77 |
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| 78 | return false;
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| 79 | }
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| 80 |
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| 81 | /**
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| 82 | * This method checks to see if it is time to run the garbage collection
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| 83 | * thread based on the settings in the gateway.properties file. If it is, then
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| 84 | * it spins off a thread to do garbage collection of the aggregator tables.
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| 85 | */
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| 86 | public static void runGarbageCollection()
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| 87 | {
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| 88 | // see if we need to run the collector...
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| 89 | //----------------------------------------
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| 90 | if (bRunCollector())
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| 91 | {
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| 92 | String sStaleDuration = "";
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| 93 | int iStaleDuration = 0;
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| 94 |
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| 95 | try
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| 96 | {
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| 97 | sStaleDuration = PropertyAccessor.getProperty(GATEWAY_PROPERTY_FILE, GARBAGE_COLLECT_STALE_DURATION);
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| 98 | iStaleDuration = Integer.parseInt(sStaleDuration);
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| 99 | }
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| 100 | catch (Exception e)
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| 101 | {
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| 102 | String sErrorMessage = "Failed to read and parse property: " + GARBAGE_COLLECT_STALE_DURATION +
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| 103 | " from PropertyFile: " + GATEWAY_PROPERTY_FILE + ".propertues. No " +
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| 104 | "garbage collection will be done on the aggregator tables.";
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| 105 | log.error(sErrorMessage);
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| 106 | return;
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| 107 | }
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| 108 |
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| 109 | if ((sStaleDuration == null) ||
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| 110 | (sStaleDuration.length() <= 0))
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| 111 | {
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| 112 | String sErrorMessage = "Failed to read and parse property: " + GARBAGE_COLLECT_STALE_DURATION +
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| 113 | " from PropertyFile: " + GATEWAY_PROPERTY_FILE + ".propertues. No " +
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| 114 | "garbage collection will be done on the aggregator tables.";
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| 115 | log.error(sErrorMessage);
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| 116 | return;
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| 117 | }
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| 118 |
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| 119 | Calendar oCal = Calendar.getInstance();
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| 120 | oCal.add(Calendar.SECOND, (-1) * iStaleDuration);
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| 121 |
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| 122 | log.debug("Running aggregator garbage collection thread now.");
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| 123 |
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| 124 | GarbageCollectorThread oCollectorThread = new GarbageCollectorThread(oCal.getTime());
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| 125 | oCollectorThread.run();
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| 126 | dtLastRun = new Date();
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| 127 |
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | }
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